Roll-polisher.



A. J. MASKHEY.

ROLL POLISHER.

APPLlcATIoN FILED 11ov.15| 1915.

1 ,21 2,534. Patend Jan. 16, 1917.

3 SHEETS--SHEET l.

m: mwa/s persas co1. Prwmumm, wAsmNrzmN. a cv A. J. MASKREY.

ROLL POLISHER.

APPLICATION FILED Nov. 15. 1915.

1.2129534. Patented Jan.16,1917.

3 SHEETS-SHEET 2.

A; J. MASKREY.

ROLL POLISHER.

APPLICATION FILED Nov. I5. IsIs.

Patented Jan. 16, Wfl?.

3 SHEETS-SHEET 3.

.ARTHUR J. MASKREY, OF CANTON, OHIO.

ROLL-POLISHER.

Specification of Letters Patent.

Patented J an. 16, 1917.

AppIication filed November 15, 1915. Serial No. 61,470.

T0 all whom it may concern Be it known that I, ARTHUR J.' MAsKnEY, a citizen of the United States, residing at Canton, in the'county of Stark and State of Ohio, have invented a new and useful Roll- Polisher, of which the following is a specification.

My invention relates to improvements in roll polishers for polishing the rolls of rolling mills and the like and has more particular reference to a. roll polisher of the character referred to which is adapted to be connected to the mill, whereby the rolls atv any or all times may be readily and easily cleaned, smoothed or trued by grinding away all scale and other foreign matter,

which frequently collects or adheres to the face or surface of the rolls.

The object of my invention is to provide aI device of the above type which can be employed for polishing the rolls without interfering in any manner with the operation of the rolls, whereby the polishing may be effected while the mill is in operation.

A further object of the invention is to provide a device which may remain upon the housing of the mill at all times and which, when in operation, causes the polishing blocks to travel laterally upon the surface of the rolls and in which the polishing blocks may always be left in contact with any portion of the rolls desired.

A further object is the provision of a device by the use of which a larger output is obtained, owing to the fact thatv the mill is never dismantled to grind the rolls by hand as in the usual manner.

A still further object is the provision of a device of this character by the use of which the rolls may be left in the mill all the week without the necessity of reducing the size of the sheets rolled therein as the polishing blocks may be placed during the most of the time adjacent the ends of the rolls to prevent the concavity of the rolls increasing by wear, said increase being usually greater in the center of the rolls than at the extremities thereof. p

With these objects in view the invention consists in the novel construction and arrangement of parts, hereinafter described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size and minor details of construction may be made which carry the guide in which the polishing stone retainer travels, showing the polishing stone in contact with the surface of the roll. Fig. 4 is a sectional view on an enlarged scale taken on the line 4 4, Fig. l. Fig. 5 is a plan view of the polishing block and retainers for the same. Fig. 6 shows a. slightly modified form of the invention. Fig. 7 shows another modification.

Similar numerals of reference indicate corresponding parts throughout the several gures of the drawings.

Heretofore in the practical operation of rolling mills, and more especially in the 0peration of sheet, tin and black-plate mills the polishing of the rolls has constituted one of the most troublesome, vexatious and eX- pensive problems.

The great cost of rolls and the care with which they must be made and used are fundamental facts of common knowledge to those skilled in the art. he rolls are so made as to produce the proper gage and quality of product when they are in actual, practical operation. lhen the rolls are cool the product is of inferior grade and uncertain gage and in order to produce rolled metal of uniformly high standard of quality it is desirable that the rolls be operated as continuously as possible so that the temperature thereof may remain substantially uniform. ln use the finely polished surfaces of the rolls become scratched, abraded and roughened. The demand of the trade is for a product having a smooth and even surface and in order to maintain the rolls in proper `condition to produce such metal frequent polishings have been heretofore necessary. This polishing has commonly been accomplished by manually holding a large polishing block of carborundum or the like against the rolls or by a somewhat crude device. adapted to be temporarily clamped to the mill, whereby a rotary grinding wheel could be brought into contact with the rolls. With either of these methods, however, it has been necessary to remove a part of the attachments belonging to the mill in order to make the rollsaccessible for the polishing operation and the removal of these attachments, the polishing itself, and the subsequent assembling of the attachments preparatory to rolling` requires considerable time. rlllhe rolls thus become cool, during this operation and the operation necessarily results in a very consi-f1- erable economic loss for all concerned` Attention should also be called to the fact that the product of mills so groimd must necessarily be of unequal quality, for the product of the mill immediately after the polishing, when the surfaces of the rolls are in the best condition, is poor because the rolls are somewhat cooled. By the time the rolls have been heated by further working the surfaces have already become somewhat roughened and uneven and at the time the rolls are in the best condition as to temperature the surfaces of the rolls have already lost their high polish. As the work proceeds the surface of the rolls becomes more and more roughened and uneven, and the product, although produced on properly heated rolls at this period becomes poorer and poorer in quality of surface until the point is reached Where the rolls must, of necessity, be repolished. 1t is., therefore,

- plainly to be seen that by the method heretofore in use the product cannot possibly be of uniform quality.

By my invention l propose to remedy the above described unsatisfactory and undesirable condition by providing a polishing device which is constantly in operation, thus maintaining the surfaces of the rolls in uniformly perfect condition at alldtinies and obviating the necessity of discontinuing rolling for the purpose of polishing. Thus the rolls may be maintained at uniform temperature at all times by reason of their constant use and not only will the product be of uniform gage and Quality of surface, but the economic loss incident to .liscontinuing rolling at frequent intervals will be avoided.

Referring more especially to the cons-:truction illustrated in Figs. 1 to 5 inclusive., the numerals 1 1, indicate the housings of a rolling mill of the usual construction. The numeral 2 indicates the upper roll and the numeral 3 the lower roll of the mill lwhich rolls may be of the plain or of the concave type, but preferably of the latter. All of these parts are ofcommon and well known construction and require no further specific description.

Essentially my invention comprises one or more polishing blocks held in constant frictional contact with the surface of the roll, means being provided for moving said polishing block or blocks laterally upon the Ynormally held in contact with the peripheral surface near the extremities of the roll. The same mechanism is provided for polishing the upper and the lower roll and therefore it is thought necessary to only describe one of these mechanisms as they are both constructed and operated the same.

The numeral l indicates short pins fixedly connected to the housings of the mill and constituting studs upon which the polishing mechanism is supported. A pair of levers 5 are provided with notched lugs 6, the notches 7 therein engaging the pins 4, the pins thus forming fulcrums upongwhich the levers pivot. The lower portion of each lever is preferably bent downwardly at an angle as indicated at 8 and a guide-trough 9 is carried between said lower extremities, said trough being provided with a groove 10 within which is slidably mounted the retainers 11, which retaine s carry the polishy ing blocks 12, said polishing blocks being formed of carborunduin, emery, sandstone or other suitable abrasive material.

'lhe retainers 11 within which the polishing blocks are carried arc sliclably mounted within the guide trough 9 and the interiors of the retainers are preferably dove-tailed to accommodate the polishing blocks which are preferably of the saine forni.

For the purpose of retaining the polishing block within the retainer a screwv 13 is located through a suitable screw threaded aperture in the back wall of the retainer, the head of said screw being counter-sunk within said wall of the retainer and the extremity le thereof being located within a suitable socket 15 fo-rmed in the polishing block.

A pair of screw threaded shafts 16 are mounted in suitable bearings 17 and 18 located upon thev upper edge of the guide trough 9 and each of said shafts is provided at its outer extremity with a beveled pinion 19, said pinions meshing with the beveled pinions 20, which are carried upon theV shafts 21, said shafts being journaled in suitable bearings 22 provided upon the levers 5. A crank 23 is provided at the upper extremity of each shaft for the purpose of manually rotating said shaft. Y

An off-set portion 24 is provided at the upper extremity of each of the levers 5, each of said off-set portions being provided with a. slot 25, adapted to receive the stem 26 to which stem is connected a `coil spring 27, the lower extremity of each coil spring being attached to a bracket 28 which is mounted upon the housing. The upper extremity of each stem 26 is screw threaded and-a wing nut 29 is provided thereon for the purpose of adjusting the tension upon the levers.

Each of the retainers is provided with a half-nut 30 which engages the adjacent screw threaded shaft 16, said half-nuts being provided with stems 31, which are slidably mounted within slots 32 formed in the guide trough.

The springs 27 hold the polishing blocks constantly in engagement with the peripheral surface of the roll and in use the polishing blocks will be normally located at each extremity of the roll for the purpose of continuously grinding and polishing the peripheral surface of the roll at each extremity thereof, thus reducing the concavity of the Aroll which is being continuously increased by the sheets being passed between the rolls continuously during the operation of the mill. lhen it is desired to polish the entire surface of the roll the cranks 23 may be rotated in order to move the polishing blocks laterally upon the face of the roll to any desired position, the rotary motion of the roll tending to cause all parts of the peripheral surface of the roll to be polished.

In order to prevent a ridge being formed upon the roll at the point where the eX- tremities of the polishing blocks meet, the inner extremity of each polishing block and retainer is beveled as indicated at 33 in Fig. 5. By this construction when the two beveled ends of the blocks come into contact with each other, at the center of the roll all parts o-f the peripheral surface of the roll adjacent the inner extremity of the polishing block will be evenly polished.

In Fig. 6 is illustrated a slightly modiiied form of construction in which only one screw threaded Shank 16a is used, said shank being provided intermediate one end and the center with right hand threads 16b and intermediate the other end andthe center with left hand threads 16C. Only one shaft 21 and crank 23 are provided in this form of the device, the rotation of the crank causing the polishing blocks to move toward or away from each other upon the surface of the roll.

In Fig. 7 of the drawings is shown another modification of the device, in which the screw threaded shaft and the operating means for the same are done away with. In this form of the device the guide trough is supported in the usual manner and only one retainer and polishing block are located therein. A wire cable 34- is attached to the retainer and is passed over suitable pulleys 35 mounted upon said trough and pulleys 36 and 37 mounted upon the housing, each eX- tremity of the wire being wound around a drum 38, said drum being provided with a worm wheel 39 which engages a worm 40, an operating crank 41 being provided upon each worm. A ratchet 42 and pawl 43 may be provided upon the drum for the purpose of holding the polishing block in any desired position.

By constructing the levers 5 as shown, with the slots 7 provided for the purpose of engaging the studs 4: upon the housings, it will be seen that in the event of an accident to the mill, if one of the rolls is displaced or broken it will not be likely to damage the polishing device but will tend to throw the levers out of engagement with the studs 4, allowing the polishing device to fall clear of the roll.

Although the drawings and above specification disclose the best mode in which I have contemplated embodying my invention I desire to be not limited to the details of such disclosure, for, in the further practical application of my invention, many changes in form and construction may be made, as circumstances require or experience suggests, without departing from the spirit of the invention, within the scope of the appended claims.

I claim:

f 1. In a roll polishing device, in combination with a rolling mill, a pair of levers pivoted upon the housings of said mill, a guide trough carried between the lower eX- tremities of said levers, a pair of polishing blocks slidably mounted within said guide trough, means connected to the upper eX- tremities of said levers for holding said polishing blocks in contact with the face of the roll, and means for simultaneously moving said polishing blocks toward or away from each other.

2. In a roll polishing device, in combination with a rolling mill, a pair of levers pivoted upon the housings of said mill, a guide trough carried between the lower extremitiesv of said levers, a pair of polishing blocks slidably mounted within said guide trough, the inner extremities of said polishing ,blocks being beveled and adapted to t together, means connected to the upper eX- tremities of said levers for holding said polishing blocks in contact with the face of the roll and means for moving said polishing blocks longitudinally within said guide trough.

In testimony that I claim the above, I have hereunto subscribed my name.

ARTHUR J. MASKREY.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, D. C. 

